24 JOURNAL OF THE [April, 



Involucrate division, with a basal spathe springing at t"he base 

 of the scape from the summit of the corm. The " Reticulati 

 Section" has a corm tunic of distinctly reticulate fibers. 



The corm is oblate, from one-half to three-fourths of an inch 

 in diameter, and three-eighths to one-half an inch high, the 

 tunic finely reticulated, while the basal tunic covering the 

 lower half of the corm is composed of unbranched radiating 

 fibers. The specimens show the reticulation of the cap, main 

 and basal tunics. 



OBJECTS FROM THE SOCIETY'S CABINET. 



9. Heliopelta (Diatom). 



This specimen is one of the type having two radial divisions, 

 the central star being five-pointed. It differs in many essential 

 features from the one given by Carpenter, in Plate I, Fig. 3, 

 between the 14th and 15th pages of his sixth edition of the 

 " Microscope and its Revelations," — description pages 350 and 

 351. Five of the radial divisions have hexagonal areolce, while 

 in the five which alternate with them, the areolation is formed 

 by equilateral triangles ; the points of the star extend into the 

 radial divisions, having the triangles, instead of in the other 

 form, as shown by Carpenter. The beaded appearance on 

 under plate is plainly seen. 



The dark corners, which Carpenter figures as divided equally 

 between the two types of the radial divisions, in this specimen 

 are confined to the corners of the radial divisions marked by the 

 equilateral triangles. It is the latter divisions which are de- 

 pressed, though they are above the border of the rim. 



The specimen is 225 micras in diameter. 



10. Gizzard of a Cricket. 



Shows several rows of horny teeth, (?) which are used in the 

 reduction of its food. 



11. Precious Serpentine. 

 (Polariscope Object.) 



